Turbine.



. P. 1v1. LBA'VITT.

TURBINE.

APPLICATION FILED JULY 15, 1912.

2 SHEETS-SHEET 1.

' INVENTOR WITNESSES; I fm" "e l 'am' f By Aitor/zeau, Y

Mw-' WS 'Patented Feb.24, 1914.

PLM. LEAVITT.

TUBBINB. APPLIUAMON FILED JULY 15, 1912.

Paentba 1161.211914,

INVENTOR 2 SHEETS-SHEET 2.

WITNESSES:

UNITED sTATEs PATENT oEEIoE.

FRANK M. LEAVITT, SMITHTOWN, NEW YRK, ASSIGNOR T E. W. BLISS COMPANY, 0FBROOKLYN, NEW` YORK,- A CORPORATION 0F WEST VIRGINIA.

TURBINE. l

Specification of Lettersvlatent.

Patented Feb. 24', 1914..

. Application led July 15, 1912. Serial N o. 709,599.

To all whom it may concern:

Be it known that I, FRANK M. LEAvrrT, a citizen of the United States,residing in Smithtown, in the county of Sudolk and State of New York,have invented certain new and useful Improvements in Turbine- Engines,of which the following'is a speciiiCatiOn.

This mventlon relates to nozzles such as are used in elastic-Huidturbines to discharge the motive fluid against the blades of the rotor,and particularly to that class employed in turbine mechanism forpropelling automobile torpedoes wherein the nozzles are subjected to anintense and sudden rise of temperature 4in the compressed air whichconstitutes the motive fluid, due to the burning-of atcombustibletherein. vTo provide a nozzle which will withstand this severe condition affords a very difficult problem. Its

v hollow form prevents forgingit in one piece.

nozzlel is made of steel by forging it in twoj pieces or sections,fitting and uniting them so as to leave a groove at their joint, and

welding them together by fusing a like or similar metal into suchgroove, after which any necessary final finishing or machining may bedone.

Figure 1 of the accompanying drawings is a viewv of the after part of'an automobile torpedo, a portion of its shell being shown as' brokenaway to disclose a part of the propelling mechanism, the latterappearing in central longitudinal'section; Fig. 2 is a view of part ofone of the bulkheads, also shown as having a broken away section todisclose one of the turbine rotors, and shows my improved nozzle inposition to discharge the motive fluid against the rotor blades;

Fig. 3 is a plan of the outer or discharge' side of the nozzle plate;Fig. is a side elevation of the nozzle plate; Fig. 5 a centrallongitudinal section of the nozzle showing the manner in which the partsare joined: Fig. v6 a cross-section on the line 6 6 of Fig. 5; Fig. 7aplan of the body portion of the nozzle; Fig. 8 a cross-section on theline 8`8 of Fig. 7; Fig, 9 a plan of the inner side of the nozzle plate;and Fig. 10 a crosssection on the line 6-6 of Fig. 5, showing vthe partsin position to be welded.

Referring to the drawings in detail, the letter A (Fig. l) indicates thebody of an automobile torpedo, B, B the propellers, and C, C thepropeller shafts.

D designates, generally, a train of gears which arearranged to rotatethe propeller shafts in reverse directions, and which are -actuated bythe turbine rotors E, E.

The letter F denotesa bulkhead which is provided with an aperture Gr.This aperture is covered by the nozzle H which is bolted to thebulkhead, and a portion of which extends therethrough so as to bring thenozzle ducts into proximity to the blades of one of the rotors E.

Having thus briefly shown the applica-f .tion of the nozzle inautomobile-torpedo propelling mechanism, I will now describe the nozzleitself and its construction in detail: l

In order to make the nozzle of forged metal, I form it in sections(preferably two `steel drop-forgings) one section, indicated by theletter II, forming the body portion having a longitudinal hollow a toform the chamber or cavity in the nozzle, and having an inletpipe-connection b and a l`flange c by which it is attached to thebulkhead; the other section J being the nozzle plate which is providedwith a plurality of extending ducts e cto discharge the motive fluidagainst the blades of the rotor. The

body portiony is milled or otherwise initially finished on the surface f(stock beingallowed for final iinishing after thelparts arejoined) andis recessed so as to forma shoulder g, the'surrounding wall h of whichis beveled, as shown in Figs.- 5, 6, 7, 8 and ,10.

The ducts ev having been cut in the nozzle plate and the necessaryfinish :given to that portion of the plate indicated by the letter iwhich extends within the hollow of the body portion, the surface 7' isfinished, and the edge 7c beveled similarly to the wall h of the bodyportion, but in the reverse direction,

so that whenthe two parts are placed tof gether as shown in Figs. 5, 6and l0, vthe surface j of the nozzle plate will rest upon the shoulder gof the body portion, leaving a V-shaped groove extendlng around thenozzle plate vbetween the two parts. Into this groove (while the partsarein the inverted position shown in Fig. 10) metal is fused Vso as toweld the two parts of the nozzle firmly together,` after which thoseouter surfaces of the nozzle that require further finishing are machinedor filed. The welding is best performed by first heating the twosections, then fusing the welding metal from a rod into the groove atopposite ends, then at successive Aintermediate points, and finallyflowing it through the entire groove. The welding instal (steel or iron,isxmost efectually fused by applying some form of intense localizedheat, such as that of an oxygen-acetylene flame, the flame being firstplayed upon the sections to pre heat and expand the welding surfaces.

I claim as my invention:

1. A nozzle for elastic-fluid turbines, comprising two forged sections,one being em-4 edded in and welded to the other.

2. A forged nozzle for elastic-fluid turbines, comprising a recessedbody portion, and a nozzle plate set into said recess and welded to thebody portion.

3. A nozzle for elastic-fluid turbines, composed of two sections, onecomprising a body portion and the other a nozzle plate, said y united bywelding.

5. A nozzle for elastic-.fluid turbines, comprising a forged, hollowedbody portion provided with a flange for securing it in position andwithan inlet opening into the hollow thereof, and a forged, elongatednozzle plate, welded tosaid body portion so as to cover the hollowtherein, said nozzle plate having a plurality of laterally distributedducts.

6. A turbine nozzle of forged steel having a anged, hollowed bodyportion, and a plural-duct nozzle plate.

7. A turbine nozzle of forged steel having a hollowed body portion and aplurality of outlet ducts.

In -witness whereof, I have hereunto signed my name in the presence oftwo subscribing witnesses.

FRANK -M. LEAVITT.

Witnesses: y

F. L. CoLwELL, Jr., WILLIAM RILEY.

